Lie backwards on a decline bench with your head at the top of the bench and your feet at the bottom of the bench.
Grab onto the pads or bar above your head (where you feet would normally go).
While keeping a slight bend in your knees, use your abs to lift your legs towards you. Think of it as a reverse crunch motion. Allow your back to round and get good spinal flexion. This will allow your abs to contract more.
Then slowly return your legs to the starting position while keeping your abs tight.
Try not to let your feet touch the floor between reps. Let them touch the floor if you need to. You can progressively make this exercise more challenging by returning your feet to the floor less times during the set.
